How Is Lift Force Calculated for a Helicopter?

Thread starter tennisacerg
Start date Oct 29, 2006
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Force Helicopter Lift Lift force

AI Thread Summary

To calculate the lift force exerted by the air on the helicopter's propellers, one must consider the helicopter's weight and the upward acceleration. The weight is calculated using the formula w = mg, where m is the mass (4600 kg) and g is the acceleration due to gravity (approximately 9.81 m/s²). The net force required for the upward acceleration is determined using F = ma, where a is the upward acceleration (2.0 m/s²). The total lift force must overcome both the weight of the helicopter and provide the additional force for acceleration. Thus, the lift force can be calculated by adding the weight and the net force required for acceleration.

Oct 29, 2006

tennisacerg

A 4600 kg helicopter accelerates upward at 2.0 m/s^2. What lift force is exerted by the air on the propellors?

I don't know how to do it.

Please help

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Oct 29, 2006

geoffjb

tennisacerg said:

A 4600 kg helicopter accelerates upward at 2.0 m/s^2. What lift force is exerted by the air on the propellors?

I don't know how to do it.

Please help

Draw a Free Body Diagram (with every force) and remember that F=ma and w=mg.

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